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Using popcount should check the popcount feature flag not the SSE41 feature flag. 

llvm-svn: 190258
This commit is contained in:
Craig Topper 2013-09-08 00:47:31 +00:00
parent 37c921e354
commit 0a63e1da92
1 changed files with 2 additions and 2 deletions
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4
llvm/lib/Target/X86/X86TargetTransformInfo.cpp
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@ -127,8 +127,8 @@ X86TTI::PopcntSupportKind X86TTI::getPopcntSupport(unsigned TyWidth) const {
assert(isPowerOf2_32(TyWidth) && "Ty width must be power of 2"); assert(isPowerOf2_32(TyWidth) && "Ty width must be power of 2");
// TODO: Currently the __builtin_popcount() implementation using SSE3 // TODO: Currently the __builtin_popcount() implementation using SSE3
// instructions is inefficient. Once the problem is fixed, we should // instructions is inefficient. Once the problem is fixed, we should
// call ST->hasSSE3() instead of ST->hasSSE4(). // call ST->hasSSE3() instead of ST->hasPOPCNT().
return ST->hasSSE41() ? PSK_FastHardware : PSK_Software; return ST->hasPOPCNT() ? PSK_FastHardware : PSK_Software;
} }
unsigned X86TTI::getNumberOfRegisters(bool Vector) const { unsigned X86TTI::getNumberOfRegisters(bool Vector) const {